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Peripheral NS (efferent (motor (Somatic NS (Spinal nerves (31 pairs …

- - - - Spinal nerves
        
        31 pairs
        
        each pair is attached
        to spinal cord by 2 roots
        
        the dorsal root &
        
        the ventral root
        
        7 vertebra
        but 8 nerves
        
        8 pair of cervical nerves
        
        12 pair of thoracic nerve
        
        5 pair of lumbar nerves
        
        5 pair of sacral nerves
        
        1 pair of coccygeal nerve
        
        8,12,5,5,1
        C,T,L,S,C
      - Cranial nerves
        
        have their cell bodies- in the brain
        
        there are 12 pair of cranial nerves
        
        some are afferent nerves ( motor)
        
        some are mixed nerves( efferent & afferent )
        
        there are 12 pair of cranial nerves
        
        some are efferent nerves ( sensory)
        
        Afferent - sensory
        efferent - motor
        mixed - both
        A-S
        E-M
      - To skeletal muscles
        
        voluntary
      - made up of nerve fibers
        going from CNS to skeletal muscles
    - - Sympathetic NS
        
        Thoracic ganglia
        
        Lumbar ganglia
        
        Also called
        thoracolumbar division
        
        mobilizes body systems
        during activity
      - Parasympathetic NS
        
        Cranial ganglia
        
        3,7,9,&10
        cranial nerves
        
        Sacral ganglia
        
        2nd, 3rd, 4th
        sacral segments
        of spinal cord
        
        Also called
        craniosacral division
        
        conserves energy
        promotes housekeeping functions
        during rest
      - All other tissues
        except
        skeletal muscles